For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningMoveable Window Schematics
Defogger Schematics
Window System Component Views
Window Systems Component Views
...
Global Positioning System (GPS)
The position of the vehicle is determined by using satellite signals, various
vehicle signals, and map data.
At times, other interference such as the satellite condition, road configuration,
condition of the vehicle, and/or other circumstances can affect the navigation system's
ability to ...
New Vehicle Break-In
Notice: The vehicle does not need an elaborate break-in. But it will
perform better in the long run if you follow these guidelines:
• Do not drive at any one constant speed, fast or slow, for the first 805 km (500
mi).
Do not make full-throttle starts. Avoid downshifting to brake or slow the v ...